Interbuilding Backbone Cable

Cables that run from a TS in one building and extend to two or more TS’s in another building are called interbuilding backbone cables.

A unique interbuilding backbone cable identifier shall be assigned to each backbone cable connecting TS’s in different buildings, and it shall have the format [b1-fs1]/[b2-fs2]-n, where:

b1-fs1 = building identifier and TS identifier for the TS in which one end of the backbone cable is terminated

b2-fs2 = building identifier and TS identifier for the TS in which the other end of the backbone cable is terminated

n = one or two alpha-numeric characters identifying a single cable with one end terminated in the TS designated b1fs1 and the other end terminated in the TS designated b2fs2

In this format, the building with the lesser alpha-numeric identifier shall be listed first. All interbuilding backbone cable identifiers in a single infrastructure should have the same format where possible.

The interbuilding backbone cable identifier shall be marked on each end of the backbone cable within 300 mm (12 in) of the end of the cable jacket.

The interbuilding backbone cable records shall contain the following information:

interbuilding backbone cable identifier (the primary indexing identifier, e.g., [ADM-3A]/[ENG-2A]-4)

type of cable (e.g., 36 optical fiber, 50/125mm, gel filled, copper armor)

type of connecting hardware, first TS (e.g., 36 568SC duplex adapter panel)

type of connecting hardware, second TS (e.g., 36 568SC duplex adapter panel)

table relating backbone terminations to other backbone terminations or horizontal links, to which they are cross-connected.

Cabling Information

Interbuilding Backbone Cable (continued)

Additional items of information desired by the system owner or operator may be added to each record, such as:

cable length

un-terminated pairs or optical fiber strands

available pairs or optical fiber strands

damaged pairs or optical fiber strands

pathway record

splice record

grounding record

Interbuilding Backbone Pair or Optical Fiber

A unique interbuilding backbone pair or optical fiber identifier shall be assigned

to each pair or optical fiber in a backbone cable connecting TS’s in different buildings, and it shall have the format [b1-fs1]/[b2-fs2]-n.d, where:

[b1-fs1]/[b2-fs2]-n = interbuilding backbone cable identifier d = two to four numeric characters identifying a single copper pair or a single optical fiber

All interbuilding backbone pair or optical fiber identifiers in a single infrastructure should have the same format where possible. The backbone pair or optical fiber shall be maintained through the Interbuilding Backbone Cable record.